From: A review of the foot function index and the foot function index – revised
Full scale | Short form | 1-11 | 12-19 | 20-39 | 40-49 | 50-68 | |
---|---|---|---|---|---|---|---|
(68 items) | (34 items) | (Pain) | (Stiffness) | (Difficulty) | (Limitation) | (Social issues) | |
Person Reliability | .96 | .95 | .89 | .89 | .94 | .78 | .84 |
Cronbach’s Alpha | .98 | .97 | .93 | .95 | .97 | .87 | .94 |
Unidimensionality Criteria (Ratio of the raw variance explained by measures: Unexplained variance in 1st contrast ≥ 3) | 56.8/10.6= | 60.2/15.8= | 66.7/22.1= | 67.5/34.7= | 72.7/15.5= | 63.4/19.2= | 53.6/18.1= |
5.4 | 3.8 | 3.0 | 1.941 | 4.69 | 3.32 | 2.963 | |
Yes | Yes | Yes | No | Yes | Yes | No |